How does amorphous calcium aluminate improve the durability of concrete?
By acacem.com
Original articles, reprinting is strictly prohibited!
Aug. 24, 2023
Keywords
Amorphous calcium aluminate, fly ash, concrete durability, drying shrinkage, freeze-thaw cracks
As we all know, the application of concrete is becoming more and more extensive, and new technologies and materials of concrete are also emerging in an endless stream. However, with more and more applications of concrete, its durability has attracted more and more attention from the industry.
The durability of concrete mainly includes resistance to drying shrinkage and frost resistance.
Concrete will lose moisture during its setting process, and cracks will occur during its drying process; at the same time, these cracks will increase year by year as the concrete structure is used, thus affecting the life of the concrete.
Due to environmental cold and heat factors, when the temperature of concrete is very low in winter, under the action of freeze-thaw cycles, tiny cracks will also appear inside the concrete, and these cracks will have a negative impact on the overall performance of concrete.
Amorphous calcium aluminate, as a new type of concrete accelerator material, has the characteristics of rapid setting, accelerated hydration, improved cement hydration activity, improved cement compactness, and higher strength and toughness of cement materials. Reduce the internal cracks of concrete and enhance the frost resistance of concrete.
The material of amorphous calcium aluminate itself has excellent compatibility with cement materials. Because of its finer fineness, stronger activity and more sufficient hydration reaction, the concrete mixed with amorphous calcium aluminate will greatly reduce its internal strength. Dry shrinkage cracks and freeze-thaw cracks.
Practice has proved that on the basis of adding amorphous calcium aluminate, adding fly ash, micro silica fume, fiber materials, etc. can effectively inhibit the generation of concrete cracks.
